I noticed the same trend over the weekend. I used ~25% of my total usage between Mon-Sat last week, yesterday I spent 4 hours using it, my usage shot up to 70% for the week. I used ~5% of what what I did the other 6 days and it totaled up to 45% of my weekly usage.
I now have 3 daughters (7, 5, 15 months) and can tell you that, yes, your life will change. You will be tired all the time, you will struggle to find time for yourself (especially for the first few months) but it will get better. I would stay up a little later or get up a little earlier so I could work on code, and my wife was pretty awesome and would let me hide in the garage if I needed to. Now, I have a 7 year old that is better at python coding than me and wants to learn Java so she can make games for her tablet that she can play with her sisters.
One more thing, enjoy the child, especially at the young age. There is nothing better than sitting on the couch with a baby on your lap sleeping while reading something on a laptop.
For some reason the idea behind Nyan Cat blows my mind. "Hey, lets add a cat face to a poptart and make it shit rainbows"... "Yea, then lets add an annoying song to it and make it loop forever"